Machine for drawing metals



(No Model.) 2 Sheets-8heet 1.

R. KENNEDY.

MACHINE FOR DRAWING METALS.

No. 369,290. v Patented Aug. 30, 1887.

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Patented Aug. 30, 1887.

H. KKENNEDY.

MACHINE FOR DRAWING METALS.

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HENRY R. KENNEDY, OF ITHAOA, NEW YORK.

MACHINE FOR DRAWING METALS.

$PECIPICATION forming part of Letters Patent No. 369,290, dated August 30, 1887.

Application filed March 21, 1887. Serial No. 231,680. (No model.)

To rtZZ whom it may concern:

Be it known that I, HENRY R. KENNEDY, of Ithaca, in the county of Tompkins and State of New York, have invented a new and Improved Machine for Drawing Metals, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved machine for drawing sheet metal, tubing, or wire.

The invention consists of a revolving cup and balls held in a circle on the said cup.

The invention also consists of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming apart of this specification,in which similar letters of reference indicate cor responding parts in all the figures.

Figure 1 is a central sectional elevation of my improvement arranged for drawing sheet metal. Fig. 2 is a similar view of the ball-cup and mandrel, showing the sheet metal drawn into a cap. Fig. 3 is a plan view of the revolving cup and its balls. Fig. 4 is a plan view of part of the stripping-plate. Fig. 5 is a sectional side elevation of my improvement arranged for drawing tubing. Fig. 6 is asimilar view of my improvement arranged for drawing wire. Fig. 7 is a plan view of the same. Fig. 8 is a sectional elevation of the entire machine. Fig. 9 is a vertical cross section of part of the same on line x :c of Fig. 8, and Fig. 10 is a similar view of part of the same on the line 3 ;1 of Fig. 8.

In the fixed bed-plate A is formed a bearing, A, in whichis mounted to revolve the cup B, provided on top withan annular .recess, B, in which are held the loose balls 0, placed along side each other. The inner points of the balls (3 are in line with the upper edge of the central aperture, B formed in the cup B, the said aperture B" terminating in the enlarged central aperture, B extending downward in the cupstem l), on which is secured the gear wheel F, meshing into the gear-wheel E, rotated by suitable means to impart a revolving motion to the cup B 5 or the latter may be retated by belts and pulley or other means. On top of the cup B is held the die F, secured to the bed-plate A,and provided with the central aperture, F, having a diameter about equal to the diameter of the circle passing through the centers of the balls 0.

The upper edge of the aperture F is rounded off and opens into the enlarged central aperture, F the upper edge of which is the cuttingpoint for the sheet metal Gr, held over the said aperture F, between the die F and the stripping-plate H, having the central aperture, H, and being secured to the bed-plate A.

The punch I fits into the central aperture, H, of the guide-plate G and upon the cuttingedge of the aperture F so that when the punch I is moved downward upon the sheet metal G it cuts a cup of the diameter of the aperture F out of the sheet metal G, the said cup remaining in the aperture F. The punch I is provided with a central aperture, 1, in which is adapted to slide the mandrel J, of less diameter on its lower end than the diameter of the aperture B The punch I is secured by set-screws or other means to the holder N, adapted to slide vertically in the guide 0, secured to the main frame 0, which also supports the bed-plate A, carrying the revolving cup B. On the holder N are secured the rods P, sliding ver tically in the said guide 0, and in a second guide, 0", and each rod 1? carries on its up per end a roller, 1?, held by the spring 1?", coiled on the rod 1? against the canrwheel Q, secured to the main shaft Q, which receives a rotary motion in any suitable manner, and is connected by belts and pulleys orother means with the shaft carrying the beveled gearwheel E, which rotates the revolving cup B.

The mandrel J is secured to a holder, R, adapted to slide vertically in the guide 0, and secured to a rod, S, guided in the upper guide, 0 and carrying a roller, S, held by the spring S, coiled on the said rod S, against the cam wheel Q, fastened on the shaft Q. The cams Q and Q, are so arranged that the punch I receives a downward motion when the shaft Q is rotated in the direction of the arrow a, so that the cam-wheels Q press the rods 13, carrying the punchholder N downward, and when the punch I is in its lowest position then the camwheel Q} commences to press on the roller S, thus pressing the rod S, the holder 1%, and the mandrel J downward. It will thus be seen that the mandrel J commences to operate after the punch I has finished its work. The punch I and the mandrel J are both returned to their former positions by the upward pressure of the springs I and Si.

The operation is as follows: The punch I is held outside of the stripping-plate H, and the sheet metal G, to be cut in a disk and drawn into a cap, is placed between the strippingplate H and the die F. The punch I now receives a downward motion by the cams Q, so that the lower outer edge of the die cuts the sheet metal G on the upper edge of the aperture F, so that a sheet-metal cup is formed, which is held in the aperture F by the punch I. The mandrel J is now moved downward by the cam Q into the center of the sheetmetal cup, which is thus forced in contact with the moving balls 0, which draw the sheet-metal cup upon the mandrel J in a cylindrical shape, as shown in Fig. 2. As soon as the cap thus made passes, by the downward motion of the mandrel J into the enlarged aperture 13, then the cup enlarges slightly by its own elasticity, and when the said mandrel J moves upward with the punch I into the position shown in Fig. 1 then the finished cup is stripped off the mandrel by the lower edge of aperture B, and the cup drops out through the aperture B". Thesheet metal G is stripped off the punch I by the stripping-plate H.

For drawing tubing I make a similar arrangement as shown in Fig. 5; but in this case I dispense with the stripping-plate H and the punch I and use a mandrel, K, which is on its lower end of a diameter equal to the inside diameter of the finished tubing, and its end K continues into an enlarged cylindrical part, K of a diameter equal to the inside diameter of the tubing being drawn. Instead of the die F, I use a plate secured to the cup B for holding the balls 0 in place.

The operation of the device last described is as follows: The cup 13 is rotated and the mandrel K is held in the position shown in Fig. 5, the tubing L to be drawn into a smaller diameter and less thickness is pushed or pulled by suitable means over the mandrel K against the reducing-balls O, which force the sheet metal tubing upon the lower end of the mandrel K, thus reducing the diameter of the tube and drawing the tube to whatever thickness may be desired, according to the relative annular space between the lower end, K, and the inner points of the balls 0.

The arrangement shown in Fig. 6 is for drawing wire, which is pushed or pulled by suitable means upon the balls 0, which move with the revolving cup 13, and thus draw the wire into the desired size.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent-- 1. In a metal-drawing machine, the combination, with a revolving cup, of balls held in a circle on the said cup, substantially as shown and described.

2. In a metal-drawing machine, the combination, with a revolving cup having a central aperture, of balls held on the said cup in a circle and surrounding the said central aperture, substantially as shown and described.

3. In a metal-drawing machine, the combi nation, with a revolving cup having a central aperture and a central annular recess, ofballs held in the said recess and placed alongside of each other, substantially as shown and described.

4. In a metal-drawing machine, the combination, with a revolving cup having a central aperture and a central annular recess, of balls held in the said recess and placed alongside each other, and a plate having a central aper ture and serving to hold the said balls on the said cup, substantially as shown and described.

5. In a metal-drawing machine, the combi nation, with a revolving cup having a central aperture and a central annular recess, of balls held-in the said recess and placed alongside of each other, and a mandrel passing through the said central aperture of the-cup, substantially as shown and described.

6. In a metal-drawing machine, the combination, with a revolving cup having a central aperture and a central annular recess,0f balls held in the said recess and placed alongside of each other, and a die having a central aperture and serving to hold the said balls in place, substantially as shown and described.

7. In a metal-drawing machine, the combination, with a revolving cup having a central aperture and a central annular recess, of balls held in the said recess and placed alongside of each other, a die having a central aperture and serving to hold the said balls in place, and a fixed stripping-plate having a central aperture and located above the said die, substantially as shown and described.

8. In a metal-drawing machine, a revolving cup having a central aperture and a'central annular recess, balls held in the said annular recess and placed alongside of each other, a die having a central aperture and serving to hold the said balls in place, and a fixed stripping-plate having a central aperture and located above the said die, in combination with a punch adapted to pass through the said guide-plate for cutting the sheet metal into a cup, and amandrel operating with the said punch and adapted to pass through the central aperture in the said revolving cup, substantially as shown and described.

HENRY n. KENNEDY.

"Witnesses ROBERT II. THURS'ION, E. C. CLEAVES. 

